import Vue from "vue";
import VueI18n from "vue-i18n";
import jsbos from "@/utils/jsbos";
import elementEnLocale from "element-ui/lib/locale/lang/en"; // element-ui lang
import elementZhLocale from "element-ui/lib/locale/lang/zh-CN"; // element-ui lang
import elementZhTWLocale from "element-ui/lib/locale/lang/zh-TW"; // element-ui lang
import enLocale from "./en";
import zhLocale from "./zh";
import zhtwLocale from "./zhtw";

Vue.use(VueI18n);

const messages = {
  zh: {
    ...zhLocale,
    ...elementZhLocale,
  },
  en: {
    ...enLocale,
    ...elementEnLocale,
  },
  zhtw: {
    ...zhtwLocale,
    ...elementZhTWLocale,
  },
};
export function getLanguage() {
  const chooseLanguage = jsbos.storageGet("language");
  if (chooseLanguage) return chooseLanguage;

  // if has not choose language
  const language = (
    navigator.language || navigator.browserLanguage
  ).toLowerCase();
  if (language.indexOf("tw") > -1) return "zhtw";
  const locales = Object.keys(messages);
  for (const locale of locales) {
    if (language.indexOf(locale) > -1) {
      return locale;
    }
  }
  return "zh";
}
const i18n = new VueI18n({
  // options: zh | zhtw | en
  locale: getLanguage(),
  silentTranslationWarn: true,
  // set locale messages
  messages,
});

export default i18n;
